Page 1 EEAM010300 Operation & Maintenance Manual PC290LC PC290NLC HYDRAULIC EXCAVATOR PC290LC-6K - K30001 SERIAL NUMBER and up PC290NLC-6K - K30001 and up Including 2 piece boom WARNING Unsafe use of this machine may cause serious injury or death. Operators and maintenance personnel must read this manual before operating or maintaining this machine.
Page 3: Foreword
Continuing improvements in the design of this machine can lead to changes in detail which may not be reflected in this manual. Consult Komatsu or your Komatsu distributor for the latest available information for your machine or for questions regarding information in this manual.
Page 4: Safety Information
If any procedures or actions not specifically recommended or allowed in this manual are used, you must be sure that you and others can do such procedures and actions safely and without damaging the machine. If you are unsure about the safety of some procedures, contact Komatsu or your Komatsu distributor.
Page 5 2. SAFETY INFORMATION 2.2. NOISE Operator ears noise value Ambient noise value (Sound pressure level) (Sound power level) 95/27/EC 95/27/EC Noise level indicated is the guaranteed value as specified in the directive 86/662/EEC, as amended by 95/27/EEC 2.3. VIBRATION • The weighted root mean square acceleration value to which the operator’s arms are subjected does not exceed 2.5 m/s •...
Page 6: Introduction
If the machine is used for a purpose that is not listed in this manual, Komatsu cannot bear any responsibility for safety. All consideration of safety in such operations is the responsibility of the user.
Page 7: Location Of Plates, Table To Enter Serial No. And Distributor
On the upper side of the engine cylinder head cover 4.3 TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR Machine serial No.: Engine serial No.: Attachment serial No.: Manufacturers name: Komatsu UK Ltd Address Durham Road Birtley Chester-Le-Street County Durham DH32QX...
Page 8 4.4 MACHINE SERIAL PLATE. MODEL SERIAL No MANUFACTURING YEAR WEIGHT ENGINE POWER MANUFACTURER Produced by Komatsu UK Ltd. for Komatsu Ltd, Tokyo, Japan.
Page 9: Table Of Contents
5. CONTENTS FOREWORD ............................0-1 SAFETY INFORMATION ........................0-2 INTRODUCTION ..........................0-4 LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR ......0-5 SAFETY GENERAL PRECAUTIONS ....................... 1-2 PRECAUTIONS DURING OPERATION .................... 1-8 7.1 Before starting engine ........................1-8 7.2 Operating machine ........................
Page 10 5. CONTENTS 12. OPERATION 12.1 Check before starting engine ....................2-39 12.2 Starting engine ........................2-49 12.3 Operations and checks after starting engine ................. 2-52 12.4 Moving machine off ........................ 2-58 12.5 Steering machine ........................2-61 12.6 Stopping machine ........................2-63 12.7 Swinging ..........................
Page 11 5. CONTENTS MAINTENANCE 17. GUIDES TO MAINTENANCE ......................3-2 18. OUTLINES OF SERVICE ........................3-5 18.1 Outline of oil, fuel, coolant ......................3-5 18.2 Outline of electric system ......................3-9 18.3 Outline of hydraulic system ....................3-10 19. WEAR PARTS LIST ..........................3-11 20.
Page 12 5. CONTENTS OPTIONS AND ATTACHMENTS 26 GENERAL PRECAUTIONS ....................... 5-2 26.1 General precautions related to safety ..................5-2 26.2 Precautions when installing attachments ................... 5-3 27. HANDLING BUCKET WITH HOOK ....................5-4 27.1 Checking for damage to bucket with hook ................. 5-4 27.2 Prohibited operations .........................
Page 13: Safety
SAFETY WARNING Read and follow all safety precautions. Failure to do so may result in serious injury or death. This safety section also contains precautions for optional equipment and attachments.
Page 14: General Precautions
WARNING: For reasons of safety, al- 6. GENERAL PRECAUTIONS ways follow these safety precautions. SAFETY RULES • ONLY trained and authorised personnel can operate and maintain the machine. • Follow all safety rules, precautions and instructions when operating or performing maintenance on the machine.
Page 15 UNAUTHORISED MODIFICATION • Any modification made without authorisation from Komatsu can create hazards. • Before making a modification, consult your Komatsu distributor. Komatsu will not be responsible for any injury or damage caused by any unauthorised modification. ALWAYS APPLY LOCK WHEN LEAVING OPERATOR’S SEAT •...
Page 16 WARNING: For reasons of safety, al- ways follow these safety precautions. 6. GENERAL PRECAUTIONS FIRE PREVENTION FOR FUEL AND OIL Fuel, oil, and antifreeze can be ignited by a flame. Fuel is particularly FLAMMABLE and can be HAZARD- OUS. • Keep flames away from flammable fluids. •...
Page 17 Asbestos dust can be HAZARDOUS to your health if it is inhaled. Your Komatsu machine and genuine Komatsu spare parts do not contain any asbestos. Use only genuine Komatsu spare parts. If spare parts containing asbestos are used, the following precautions must be observed: •...
Page 18 For details of safety guards, please contact your Komatsu distributor. Also, even for other types of work, if there is any danger of being hit by falling or flying objects or of objects entering the operator’s cab, select and install a guard that matches the working conditions.
Page 19 • Do not use attachments that are not authorised by Komatsu or your Komatsu distributor. Use of unauthor- ised attachments could create a safety problem and adversely affect the proper operation and useful life of the machine.
Page 20: Precautions During Operation
7. PRECAUTIONS DURING OPERATION 7.1 BEFORE STARTING ENGINE SAFETY AT WORKSITE • Before starting the engine, thoroughly check the area for any unu- sual conditions that could be dangerous. • Before starting the engine, examine the terrain and soil conditions of the worksite.
Page 21 WARNING: Failure to follow these safety precautions may lead to a serious accident. 7. PRECAUTIONS DURING OPERATION VENTILATION FOR ENCLOSED AREAS • If it is necessary to start the engine within an enclosed area, provide adequate ventilation. Exhaust fumes from the engine can KILL. PRECAUTIONS FOR MIRRORS, WINDOWS AND LIGHTS •...
Page 22: Operating Machine
WARNING: For reasons of safety, al- 7. PRECAUTIONS DURING OPERATION ways follow these safety precautions. 7.2 OPERATING MACHINE WHEN STARTING THE ENGINE • Walk around for machine again just before mounting it, to check for people and objects that might be in the way.
Page 23 WARNING: Failure to follow these safety 7. PRECAUTIONS DURING OPERATION precautions may lead to a serious accident. PRECAUTIONS WHEN TRAVELLING • Fold in the work equipment as shown in the diagram below, and keep it at a height of 40-50 cm (16 to 20 in) from the ground level before starting to travel.
Page 24 WARNING: For reasons of safety, al- 7. PRECAUTIONS DURING OPERATION ways follow these safety precautions. PROHIBITED OPERATIONS • Do not dig the work face under an overhang. This may cause the overhang to collapse and fall on top of the machine.
Page 25 WARNING: Failure to follow these safety precautions may lead to a serious accident. 7. PRECAUTIONS DURING OPERATION DO NOT HIT WORK EQUIPMENT • When working in places where there are height limits, such as in tunnels, under bridges, under electric cables, or in garages, be extremely careful not to hit the boom or arm.
Page 26 WARNING: For reasons of safety, al- ways follow these safety precautions. 7. PRECAUTIONS DURING OPERATION OPERATIONS ON SLOPES • When working on slopes, there is danger that the machine may lose its balance and turn over when the swing or work equip- ment are operated.
Page 27: Transportation
WARNING: Failure to follow these safety precautions may lead to a serious accident. 7. PRECAUTIONS DURING OPERATION 7.3 TRANSPORTATION LOADING AND UNLOADING • Loading and unloading the machine always involves potential hazards. EXTREME CAUTION SHOULD BE USED. When loading or unloading the machine, run the engine at low idling and travel at low speed. •...
Page 28: Battery
WARNING: For reasons of safety, al- ways follow these safety precautions. 7. PRECAUTIONS DURING OPERATION 7.4 BATTERY BATTERY HAZARD PREVENTION • Battery electrolyte contains sulphuric acid and can quickly burn the skin and eat holes in clothing. If you spill acid on yourself, immediately flush the area with water.
Page 29: Towing
WARNING: Failure to follow these safety precautions may lead to a serious accident. 7. PRECAUTIONS DURING OPERATION 7.5 TOWING WHEN TOWING, ATTACH WIRE TO FRAME • Injury or death could result if a disabled machine is towed incorrectly. • If you machine is towed by another machine, ALWAYS use a wire rope with a sufficient towing capacity. •...
Page 30: Bucket With Hook
WARNING: For reasons of safety, al- 7. PRECAUTIONS DURING OPERATION ways follow these safety precautions. 7.6 BUCKET WITH HOOK 7.6.1 GENERAL PRECAUTIONS SPECIAL HOOK • When carrying out lifting work, the special lifting hook is nec- GEFAHR essary. • The following operations are prohibited. °...
Page 31 WARNING: Failure to follow these safety precautions may lead to a serious accident. 7. PRECAUTIONS DURING OPERATION OPERATION SUPERVISOR • Before performing lifting operation, designate an operation supervisor. Always execute operation according to his instructions. ° Execute operating methods and procedures under his direction. °...
Page 32 WARNING: For reasons of safety, al- ways follow these safety precautions. 7. PRECAUTIONS DURING OPERATION 7.6.2 PRECAUTIONS FOR LIFTING OPERATION GRADUAL LIFTING OPERATION • When carrying out lifting operations, run the engine at low idling and use the L.O. (lifting operation mode). •...
Page 33: Precautions For Maintenance
8. PRECAUTIONS FOR MAINTENANCE 8.1 BEFORE CARRYING OUT MAINTENANCE WARNING TAG • If others start the engine or operate the controls while you are performing service or lubrication, you could suffer serious injury or death. • ALWAYS attach the WARNING TAG to the control lever in the operator’s cab to alert others that you are working on the machine.
Page 34 WARNING: For reasons of safety, al- ways follow these safety precautions. 8. PRECAUTIONS FOR OPERATION STOP THE ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE • Always stop the machine on firm flat ground and stop the engine before carrying out inspection and main- tenance.
Page 35 Failure to follow these safety precau- tions may lead to a serious accident. 8. PRECAUTIONS FOR OPERATION RADIATOR WATER LEVEL • If it is necessary to add water to the radiator, stop the engine and allow the engine and radiator to cool down before adding the water.
Page 36: During Maintenance
WARNING: For reasons of safety, al- ways follow these safety precautions. 8. PRECAUTIONS FOR MAINTENANCE 8.2 DURING MAINTENANCE PERSONNEL • Only authorised personnel can service and repair the machine. Extra precaution should be used when grinding, welding, and using a sledge-hammer. ATTACHMENTS •...
Page 37 WARNING: For reasons of safety, always follow these safety precautions. 8. PRECAUTIONS FOR OPERATION PRECAUTIONS WITH BATTERY • When repairing the electrical system or when carrying out electrical welding, remove the negative (-) terminal of the battery to stop the flow of current. HANDLING HIGH-PRESSURE HOSES •...
Page 38 WARNING: For reasons of safety, al- 8. PRECAUTIONS FOR MAINTENANCE ways follow these safety precautions. PRECAUTIONS WHEN CARRYING OUT MAINTENANCE AT HIGH TEMPERATURE OR HIGH PRESSURE • Immediately after stopping operations, the engine cooling water and oil at all parts is at high temperature and under high pressure.
Page 39 WARNING: For reasons of safety, always follow these safety precautions. 8. PRECAUTIONS FOR OPERATION WASTE MATERIALS • Never dump waste oil in a sewer system, rivers, etc. • Always put oil drained from your machine in containers. Never drain oil directly on the ground. •...
Page 40: Position For Attaching Safety Labels
Always keep these labels clean. If they are lost or damage, attach them again or replace them with a new label. There are other labels in addition to the safety labels listed as follows, so handle them in the same way. Safety labels are available from your Komatsu distributor. POSITION FOR ATTACHING SAFETY LABELS 1-28...
Page 41 • Keep the manual in machine cab near op- erator. If this manual is lost, please contact your Komatsu distributor for a replacement. 2. 2OE-00-KI230 3. 20Y-00-K2220 Warnings when opening front window • When raising window, • Emergency exit lock it in place with lock pins on both sides.
Page 42 WARNING: For reasons of safety, al- ways follow these safety precautions. 4. 2OE-00-K1130 6. 2OE-00-K1150 Keeping out of moving area To prevent SEVERE IN- JURY or DEATH do the following before moving machine or its attach- ments: • Sound horn to alert people nearby.
Page 43 WARNING: Failure to follow these safety precautions may lead to a serious accident. 10. 2OE-00-K1190 8. 2OE-00-K1310 Warning for high temperature coolant and oil • Do open Hot water and oil cover while en- hazard gine is running. To prevent hot water and oil from spurting out: •...
Page 44 MEMO 1-32...
Page 45: Operation
OPERATION...
Page 46: General View
10. GENERAL VIEW 10.1 GENERAL VIEW OF MACHINE If directions are indicated in this section, the refer to the directions shown by in the arrows in the diagram below.
Page 47: General View Of Controls And Gauges
10. GENERAL VIEW 10.2 GENERAL VIEW OF CONTROLS AND GAUGES Service meter Display (for clock and Fuel gauge fault indication) Fuel level monitor Engine water temperature gauge Engine oil level monitor Engine water temperature monitor Hydraulic oil level monitor Engine oil pressure monitor Charge level monitor Radiator water level monitor Engine pre-heating...
Page 48: Explanation Of Components
11. EXPLANATION OF COMPONENTS The following is an explanation of the devices needed for operating the machine. To carry out suitable operations correctly and safely, it is important to understand fully the methods of operating the equipment and the mean- ings of the displays.
Page 49 11. EXPLANATION OF COMPONENTS B. CAUTION ITEMS (11.1.2) CAUTION If these monitor items flash, check and repair the appropriate location as soon as possible. These are items which need to be observed while the engine is run- ning. If any abnormality occurs, items which need to be repaired as soon as possible are displayed.
Page 50 11. EXPLANATION OF COMPONENTS 11.1.1 A: BASIC CHECK ITEMS NOTICE Do not rely on the “BASIC CHECK ITEMS” only for the check before starting Always refer to the periodic maintenance items or 12. “OPERA- TION” to carry out the checks. RADIATOR WATER LEVEL This warns that the radiator cooling water level is too low.
Page 51 11. EXPLANATION OF COMPONENTS HYDRAULIC OIL LEVEL This warns that the hydraulic oil level is to low. If the monitor lamp flashes, check the hydraulic oil level, and add oil. REPLACEMENT OF ENGINE OIL (for only set machines) If the set time (125, 250, 500H) passes after the engine oil is re- placed, this lamp lights up.
Page 52 11. EXPLANATION OF COMPONENTS 11.1.3 C: EMERGENCY STOP ITEMS CAUTION If any monitor lamp flashes, stop the engine or run it at low idling, and take the following action. ENGINE WATER TEMPERATURE If the temperature of the engine cooling water becomes abnormally high, the monitor lamp flashes, and the overheat prevention system is automatically actuated to reduce the engine speed.
Page 53 11. EXPLANATION OF COMPONENTS 11.1.4 D: METER DISPLAY PORTION PILOT DISPLAY When the starting switch is ON, the pilot display lights up when the display items are functioning. ENGINE PRE-HEATING MONITOR This monitor lamp indicates the pre-heating time required when start- ing the engine at an ambient temperature below 0 The monitor lamp lights when the starting switch is turned to HEAT position and flashes after about 30 seconds to show that the pre-heating...
Page 54 11. EXPLANATION OF COMPONENTS METERS ENGINE WATER TEMPERATURE GAUGE This gauge indicates the engine cooling water temperature. If the temperature is normal during operation, the green range will light up. If the red range lights up during operation, the overheat prevention system will be actuated.
Page 55 11. EXPLANATION OF COMPONENTS Manual setting When the time is displayed, depress clock switch for 2.5 sec or more. “TIME” flashes. Pressing H switch increases hours and pressing M switch creases minutes. If switch is pressed for 2.5 seconds or more, hours or minutes increase continuously.
Page 56 11. EXPLANATION OF COMPONENTS 11.1.5 E: SWITCHES WORKING MODE SELECTOR SWITCH (Basic switch) This switch is used to set the movement or power for the work equip- ment. By selecting the mode to match the working conditions, it is possi- ble to carry out operations more easily.
Page 57 11. EXPLANATION OF COMPONENTS AUTO-DECELERATION SWITCH (Selection switch) This switch acts to activate the function that automatically lowers the engine speed and reduces fuel consumption when the control lever is at neutral. ON lights up: Auto-deceleration is actuated. OFF: Auto-deceleration is cancelled. Each time the switch is pressed, the auto-deceleration is actuated or cancelled.
Page 58 11. EXPLANATION OF COMPONENTS POWER MAX./SWIFT SLOW-DOWN SWITCH During operations, the digging power can be increased and the speed reduced by a one-touch operation of the knob button /single click while pushing). Power max. (power up) lights up: When the working mode is heavy-duty and general operation mode only, the power can be increased while the knob button is being pressed.
Page 59: Meter
11. EXPLANATION OF COMPONENTS 11.2 METER HOUR METER This meter shows the total operation hours of the machine. Set the periodic maintenance intervals using this display. The hour meter ad- vances while the engine is running - even if the machine is not travelling. The meter will advance by 1 for each hour of operation regardless of the engine speed.
Page 60: Switches
11. EXPLANATION OF COMPONENTS 11.3 SWITCHES STARTING SWITCH This switch is used to start or stop the engine. OFF position The key can be inserted or withdrawn. Except for the cab lamp, radio (if fitted) and clock, the switches for the electric system are all turned off and the engine is stopped.
Page 61 Pull out the lighter and light your cigarette. Nothing may be connected to the cigarette lighter without the prior permission of an authorised Komatsu distributor. SWING LOCK SWITCH WARNING • When the machine is travelling under its own power, or when the swing is not being operated, always set the switch to the ON (ACTUATED) position.
Page 62 11. EXPLANATION OF COMPONENTS LAMP SWITCH This switch turns on the working lamps and monitor illumination. Standard work lamps Standard and additional work lamps (if fitted) ALARM BUZZER STOP SWITCH This is used to stop the alarm buzzer when it has sounded to warn of some abnormality in the EMERGENCY STOP ITEMS while the engine is running.
Page 63 11. EXPLANATION OF COMPONENTS 13. CAB LAMP SWITCH This lights up the cab lamp. ON position: Lights up The cab lamp can be turned on even when the starting switch is at the OFF position, so be careful not to leave it on by mistake. 14.
Page 64: Control Levers, Pedals
11. EXPLANATION OF COMPONENTS 11.4 CONTROL LEVERS, PEDALS SAFETY LOCK LEVER WARNING • When leaving the operator’s compartment, set the safety lock lever securely to the LOCK position. If the control levers are not locked, and they are touched by mistake, this may lead to a serious accident.
Page 65 11. EXPLANATION OF COMPONENTS This lever locks the work equipment, swing and attachment controls. This lock lever is a hydraulic lock, so even if it is in the lock position, the work equipment control lever will move, but the work equipment and swing motor will not work.
Page 66 11. EXPLANATION OF COMPONENTS LEFT WORK EQUIPMENT CONTROL LEVER (with auto-deceleration device) WARNING If any lever is operated when in the deceleration range, the en- gine speed will suddenly increase, so be careful when operating the levers. This lever is used to operate the arm and upper structure. Arm operation Swing operation Arm OUT...
Page 67 • Please note your prefered switch position against attacment used for your future reference. Switch Position Approximate Full Maximum Flow Flow (L/min) Attachment • Adjustment of these range of flows is possible. Contact your Komatsu dealer if required. 2-23...
Page 68 11. EXPLANATION OF COMPONENTS HYDRAULIC OIL FLOW When the front part of the pedal is depressed, the hydraulic oil flows into the left-hand work equipment piping, and, when the rear part of the pedal is depressed, the oil flows into the right-hand work equipment pip- ing.
Page 69: Ceiling Window
11. EXPLANATION OF COMPONENTS 11.5 CEILING WINDOW When opening Lock the safety lock lever securely. Check for an ceiling window movement by pulling lock located on both sides, then push up and open the ceiling window grasping grip When closing Close the ceiling window grasping grip and lock it with lock .
Page 70: Front Window
11. EXPLANATION OF COMPONENTS 11.6 FRONT WINDOW WARNING When opening the front window, always hold grip firmly with both hands and pull up. If you use only one hand, your hand may slip and get caught. It is possible to store (pull up) the front window (top) in the roof of the operator’s compartment.
Page 71 11. EXPLANATION OF COMPONENTS From the inside of the operator’s cab, hold the bottom grip with the left hand and the top grip with the right hand, pull up the window, and push it in fully until it is locked by catch Lock with lock pins on the left and right sides.
Page 72: Door Lock
11. EXPLANATION OF COMPONENTS Lock securely with lock pins at the left and right sides Removing front window (bottom) Ensure lower wiper (if fitted) is in correct park position. With the front window open, remove lock pins , and the bottom part of the front window can be removed.
Page 73: Cap, Cover With Lock
11. EXPLANATION OF COMPONENTS 11.8 CAP, COVER WITH LOCK The fuel filler, operator’s cab, engine hood, battery box cover, right side door and left side door of the machine body are fitted with locks. Use the starting switch key to lock or unlock these places. 11.8.1 METHOD OF OPENING AND CLOSING CAP WITH LOCK (For the fuel tank filler port) To open the cap...
Page 74: Luggage Tray
11. EXPLANATION OF COMPONENTS 11.9 LUGGAGE TRAY This tray is located to the rear of the operator’s seat. Always keep the operation & maintenance manual in this box for easy reading access. 11.10 ASHTRAY This is on the side of the operator’s seat. Always make sure that you extinguish the cigarette before closing the lid.
Page 75: Air Conditioner
11. EXPLANATION OF COMPONENTS Temperature control slider This adjust out air temperature To increase temperature of outlet air: move slides to left (red) To decrease temperature of outlet air: move slides to right (blue) Air flow selector switch This switch adjust air flow in three steps Defroster selector lever This lever is used to remove condensation or ice from the lower part of the front window.
Page 76 11. EXPLANATION OF COMPONENTS Outlet air distribution slider. Outlet air can be distributed through various vents in the operators cab. Sending air to upper area Purpose Sending air to lower area of of operator’s seat and defrosting operator’s seat and defrosting upper part of front window.
Page 77 11. EXPLANATION OF COMPONENTS Defroster selector lever This lever is used to remove condensation or ice from the lower part of front window during winter or rainy season. Selector lever forward: defrost Selector lever backwards: warms operator’s feet Defroster is available when air outlet slider is in the position shown by decal: Defroster Feet...
Page 78 11. EXPLANATION OF COMPONENTS 11.13 CAB RADIO (OPTION) Refer to the separate operation manual for radio cassette. Note Ensure radio is switched off when leaving the machine for long peri- ods to prevent draining of battery charge. Antenna If the reception is weak or generates noise, extend the antenna. If the reception is to strong, adjust the sensitivity by retracting the antenna.
Page 79: Fuse
11. EXPLANATION OF COMPONENTS 11.14 FUSE NOTICE Before replacing a fuse, be sure to turn off the starting switch. The fuses protect the electrical equipment and wiring from burning out. If the fuse becomes corroded, or white powder can be seen, or the fuse is loose in the fuse holder, replace the fuse.
Page 80: Fusible Link
Never splash or spill water, mud or drink over the controllers as this may cause a fault. • If a fault occurs in the controller, do not attempt repair, but con- sult your Komatsu distributor. 11.17 TOOL BOX The tray is used for keeping the tools.
Page 81: Handling The Accumulator
When disposing of the accumulator, it is necessary to re lease the gas from the accumulator, so please contact your Komatsu distributor. This machine is equipped with the accumulator in the control circuit. The accumulator is a device to store the pressure in the control circuit, and when it is installed, the control circuit can be operated for a short time even after the engine is stopped.
Page 82 11. EXPLANATION OF COMPONENTS 11.19.1 METHOD FOR RELEASING PRESSURE IN CONTROL CIRCUIT OF MACHINES EQUIPPED WITH ACCUMULATOR Lower the work equipment to the ground. Close any attachment such as the crusher attachment jaws, etc. Stop the engine. Move the safety lock lever completely in the FREE position. Move the work equipment control lever and attachment control pedal full to the back and forth, right and left so as to release the pressure in the control circuit.
Page 83: Operation
Check carefully, and if any abnormality is found, always repair it or contact your Komatsu distributor. Before starting the engine, look around the machine and under the machine to check for loose nut or bolts, or leakage of oil, fuel, or coolant, and check the condition of the work equipment and hydraulic system.
Page 84 Check bucket with hook for damage Check the hook, catcher and hook foot for damage. If damage is found, contact your Komatsu distributor for repair. 2-40...
Page 85 12. OPERATION 12.1.2 CHECK BEFORE STARTING Always carry out the items in this section before starting the engine each day. CHECK COOLANT LEVEL, ADD WATER WARNING Do not open the radiator cap unless necessary. When checking the coolant, always check the radiator reserve tank when the engine is cold.
Page 86 12. OPERATION If the oil is above the H mark, drain the excess engine oil from drain , and check the oil level again. If the oil level is correct, tighten the oil filler cap securely and close the engine hood. REMARK When checking the oil level after the engine has been operated, wait for at least 15 minutes after stopping the engine before checking.
Page 87 12. OPERATION CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL WARNING • When removing the oil filler cap, oil may spurt out, so turn the cap slowly to release the internal pressure before removing the cap. • If oil has been added to above the H mark, stop the engine and wait for the hydraulic oil to cool down, then drain the excess oil from the drain plug If the work equipment is not in the condition shown in the diagram on...
Page 88 • Starting motor • Alternator Please contact your Komatsu distributor for investigation and correc- tion of the cause. CHECK FOR WATER AND SEDIMENT IN WATER SEPARATOR. Drain water & sediment A fuel sedimentor is mounted in pump compartment. Entrapped sedi- ment &...
Page 89 12. OPERATION 12.1.3 ADJUSTMENT BEFORE OPERATION OPERATOR’S SEAT (A) Fore-and-aft adjustment of seat Pull lever up. After the seat is set to the desired position, release the lever. NOTE: This operation will not affect relative position of seat and wrist control levers. (B) Fore-and-aft adjustment of seat Pull lever up.
Page 90 12. OPERATION (D) Adjustment of arm-rest height Turn thumbwheel to adjust armrests to comfortable height. (Armrest can also be lifted upwards to ease access) (E) Adjustment of tilting seat ange Lift lever to alter seat angle, release lever when seat is in required position.
Page 91 • Swing lock monitor • Overload caution monitor If the monitors or gauges do not light up or the buzzer does not sound, there is probably a broken bulb or disconnection in the monitor wiring, so contact your Komatsu distributor for repairs. 2-47...
Page 92 • Fuel gauge (2) Press lamp switch to turn on the head lamps. If the lamp switch do not light up, there is probably a broken bulb or disconnection in the wiring, so contact your Komatsu distributor for repairs. 2-48...
Page 93: Starting Engine
12. OPERATION 12.2 STARTING ENGINE 12.2.1 NORMAL STARTING WARNING Check that there are no persons or obstacles in the surrounding area, then sound the horn and start the engine. NOTICE Do not keep the starting motor rotating continuously for more than 20 seconds.
Page 94 12. OPERATION 12.2.2 STARTING IN COLD WEATHER WARNING • Check that there are no persons or obstacles in the surround- ing area, then sound the horn and start the engine. • Never use starting aid fluids as they may cause explosions. NOTICE Do not keep the starting motor rotating continuously for more than 20 seconds.
Page 95 12. OPERATION When preheating monitor flashes, turn the key in starting switch to the START position to start the engine. Ambient temperature Preheating time Above 0 C to -10 20 seconds C to -20 30 seconds When the engine starts, release the key in starting switch The key will return automatically to the ON position.
Page 96: Operations And Checks After Starting Engine
12. OPERATION 12.3 OPERATIONS AND CHECKS AFTER STARTING ENGINE WARNING • Emergency stop If there has been any abnormal actuation or trouble, turn the starting switch key to the OFF position. • If the work equipment is operated without warming the ma- chine up sufficiently, the response of the work equipment to the movement of the control lever will be slow, and the work equipment may not move as the operator desires, so always...
Page 97 12. OPERATION Set the safety lock lever to the FREE position, and raise the bucket from the ground. (Mono Boom) Operate bucket control lever and arm control lever slowly to move the bucket cylinder and arm cylinder to the end of the stroke. 4-A (Two Piece Boom) Left equipment control lever This is used to operate the arm and swing.
Page 98 12. OPERATION Carry out bucket and arm operation for 5 minutes at full stroke, alternat- ing between bucket operation and arm operation at 30 second intervals. If the swing lock switch is set to the ON (actuated) position and swing control lever is operated at full stroke, oil temperature rise can be increased earlier.
Page 99 12. OPERATION Press working mode switch on the monitor panel until H.O (heavy duty operation) mode lamp lights up. Turn fuel control dial to the mid-range speed position. Set safety lock lever to the FREE position and raise the bucket from the ground.
Page 100 12. OPERATION Turn fuel control dial to the full speed (MAX) position and carry out the operation is Step 6 for 3 -5 minutes. Repeat the following operation 3 - 5 times and operate slowly. • Boom operation RAISE LOWER •...
Page 101 12. OPERATION NOTICE Cancelling automatic warming-up operation If it becomes necessary in an emergency to lower the engine speed to low idling, cancel the automatic warming-up operation as follows. Turn fuel control dial to the full speed (MAX) position and hold it for 3 seconds.
Page 102: Moving Machine Off
12. OPERATION 12.4 MOVING MACHINE OFF 12.4.1 MOVING MACHINE FORWARD WARNING • Before operating the travel levers, check the direction of the track frame. If the sprocket is at front, the operation of the track levers is reversed. • When moving off, check that the area around the machine is safe, and sound the horn before moving.
Page 103 12. OPERATION Operate right and left travel levers or right and left travel pedals as follows. • When the sprocket is at the rear of the machine. Push levers forward slowly or depress the front part of pedals slowly to move the machine off. •...
Page 104 12. OPERATION Turn fuel control dial towards the full speed (MAX) position to in- crease the engine speed. Set safety lock lever in the FREE position, fold the work equip- ment, and raise it 40 - 50 cm (16 to 20 in) from the ground. Operate right and left travel levers or right and left travel pedals as follows.
Page 105: Steering Machine
12. OPERATION 12.5 STEERING MACHINE 12.5.1 STEERING (changing direction) WARNING Before operating the travel levels, check the position of the sprocket. If the sprocket is at the front, the operation of the travel levels is reversed. Use the travel levers to change direction. Avoid sudden changes of direction as far as possible.
Page 106 12. OPERATION When making counter-rotation turn (spin turn) When turning left using counter-rotation, pull the left travel lever back and push the right travel lever forward. REMARK When turning to the right using counter-rotation, pull the right travel lever back and push the left travel lever forward. 2-62...
Page 107: Stopping Machine
12. OPERATION 12.6 STOPPING MACHINE WARNING • Avoid stopping suddenly. Give yourself ample room when stopping. • When stopping the machine, select flat hard ground and avoid dangerous places. If it is unavoidably necessary to park the machine on a slope, insert chocks underneath the wheels. As an additional safety measure, thrust the bucket into the ground.
Page 108: Swinging
12. OPERATION 12.7 SWINGING WARNING When operating the swing, check that the area around the ma- chine is safe. Before operating the swing, turn swing lock switch OFF (CAN- CELLED). NOTICE Check that swing lock lamp goes out at the same time. BP00100 Operate the left work equipment control lever to swing the upper...
Page 109: Operation Of Work Equipment
12. OPERATION 12.8 OPERATION OF WORK EQUIPMENT WARNING If any lever is operated when in the deceleration range, the en- gine speed will suddenly increase, so be careful when operat- ing the levers. The work equipment is operated by the left and right work equip- ment control levers.
Page 110: Handling Active Mode
12. OPERATION 12.9 HANDLING ACTIVE MODE Make full use of the active mode to match the purpose and condi- tions of the operation in order to carry out operations effectively and efficiently. The active mode selector switch can be turned ON (lights up) in order to provide quick leveling operations and effective deep digging and loading operations.
Page 111 12. OPERATION Turn on the active mode selector switch (lights up). While in this condition, press and hold the knob switch of the left- hand work equipment lever once (single click). Since the machine returns to the normal active mode in 8.5 sec after the switch is pressed, use the active power-max function ef- fectively for heavy and quick work.
Page 112: Working Mode Selection
12. OPERATION 12.10 WORKING MODE SELECTION WORKING MODE The mode selector switches can be used to switch the mode to match the conditions and purpose of work, thereby enabling efficient op- eration. Use the following procedures to make the most effective use of each mode.
Page 113 12. OPERATION POWER MAX./SWIFT SLOW-DOWN During operation, power up/speed down of work equipment can be performed by one-touch. Use this function effectively in combination with working mode. When starting switch is turned ON, the power up lamp turns on. When SET switch is pressed once, the speed down lamp turns on and the power up lamp goes out, and when pressed again, the oppo- site occurs.
Page 114: Prohibitions For Operation
12. OPERATION 12.11 PROHIBITIONS FOR OPERATION WARNING • If it is necessary to operate the work equipment control lever when the machine is travelling, stop the machine before oper- ating the work equipment control lever. • If the lever is moved inside the deceleration range, engine speed will suddenly rise.
Page 115 12. OPERATION Prohibited operations using dropping force of machine. Do not use the dropping force of the machine for digging. Digging rocky ground It is better to excavate hard rocky ground after breaking it up by some other means. This will not only reduce damage to the machine but make for better economy.
Page 116: Precaution For Operation
12. OPERATION 12.12 PRECAUTIONS FOR OPERATION PRECAUTIONS WHEN TRAVELLING When travelling over obstacles such as boulders or tree stumps, the machine (in particular, the undercarriage) is subjected to a large shock, so reduce the travel speed and travel over the obstacle at the center of the tracks.
Page 117: Precaution When Travelling Up Or Down Hills
12. OPERATION 12.13 PRECAUTIONS WHEN TRAVELLING UP OR DOWN HILLS WARNING • When travelling, raise the bucket approx. 20 - 30 cm (8 -12 in) from the ground. Do not travel downhill in reverse. • When travelling over ridges or other obstacles, keep the work equipment close to the ground and travel slowly.
Page 118 12. OPERATION Braking when travelling downhill To brake the machine during downhill runs, put the travelling and steering lever in the neutral position. This will cause the brake to be auto- matically applied. If shoes slip When travelling uphill, if the shoes slip or it is impossible to travel uphill using the force of the track only, it is possible to use pulling force of the arm to help the machine travel uphill.
Page 119: How To Escape From Mud
12. OPERATION 12.14 HOW TO ESCAPE FROM MUD Always operate carefully to avoid getting stuck in mud. If the ma- chine does get stuck in mud, use the following procedures to get the ma- chine out. 12.14.1 WHEN ONE SIDE IS STUCK When only one side is stuck in mud, use the bucket to raise the track then lay boards or logs and drive the machine out.
Page 120: Work Possible Using Hydraulic Excavator
12. OPERATION 12.15 WORK POSSIBLE USING HYDRAULIC EXCAVATOR In addition to the following, it is possible to further increase the range of applications by using various attachments. 12.15.1 BACKHOE WORK When condition of the machine is as shown in the diagram at right, each cylinders maximum pushing excavation force is obtained when the bucket cylinder and link, arm cylinder and arm are at 90 When excavating, use this angle effectively to optimise your work...
Page 121: Replacement And Inversion Of Bucket
12. OPERATION 12.16 REPLACEMENT AND INVERSION OF BUCKET WARNING • When knocking the pin in with a hammer, metal particles may fly and cause serious injury, particularly if they get into your eyes. When carrying out this operation, always wear goggles, helmet, gloves, and other protective equipment.
Page 122 12. OPERATION 12.16.2 INVERSION Place the bucket in contact with a flat surface. REMARK When removing the pins, place the bucket so that it is in light contact with the ground. If the bucket is lowered strongly to the ground, the resistance will be increased and it will be difficult to remove the pins.
Page 123: Parking The Machine
12. OPERATION 12.17 PARKING THE MACHINE WARNING • Avoid stopping suddenly. Give yourself ample room when stopping. • When stopping the machine, select flat hard ground and avoid dangerous places. If it is unavoidably necessary to park the machine on a slope, insert chocks underneath the wheels. As an additional safety measure, thrust the bucket into the ground.
Page 124: Check After Finishing Work
12. OPERATION Lower the bucket horizontally until the bottom touches the ground. Set safety lock lever in the LOCK position. 12.18 CHECK AFTER FINISHING WORK Check the engine water temperature, engine oil pressure and fuel level on the monitor. 2-80...
Page 125: Stopping Engine
12. OPERATION 12.19 STOPPING ENGINE NOTICE If the engine is abruptly stopped before it has cooled down, en- gine Iife may be greatly shortened. Consequently, do not abruptly stop the engine apart from an emergency. In particular, if the engine has overheated, do not abruptly stop it but run it at medium speed to allow it to cool gradually, then stop Run the engine at low idling speed for about 5 minutes to allow it go gradually cool down.
Page 126: Check After Stopping Engine
12. OPERATION 12.20 CHECK AFTER STOPPING ENGINE Walk around the machine and check the work equipment, paintwork, and undercarriage, and check also for leakage of oil or water. If any abnormalities are found, repair them. Fill the fuel tank. Check the engine compartment for paper and debris. Clean out any paper and debris to avoid a fire hazard.
Page 127: Transportation
13. TRANSPORTATION When transporting the machine, observe all related laws and regula- tions, and be careful to assure safety. 13.1 LOADING, UNLOADING WORK WARNING • Loading or unloading the machine can be a dangerous opera- tion, so be particularly careful. When loading or unloading the machine, run the engine at low idling and travel at low speed.
Page 128 13. TRANSPORTATION Set the travel speed switch to the Lo position. Turn the auto-deceleration switch OFF, and return the fuel control dial to reduce the engine speed. Turn the swing lock switch ON to apply the swing lock. Set in the direction of the ramps, lower the work equipment as far as possible without letting it hit the trailer, then travel slowly to load or unload the machine.
Page 129: Precautions For Loading
13. TRANSPORTATION 13.2 PRECAUTIONS FOR LOADING WARNING When loading the machine, park the trailer on a flat firm road- bed. Keep a fairly long distance between the road shoulder and the machine. After loading to the specified position, secure the machine as fol- lows.
Page 130: Precautions For Transportation
13. TRANSPORTATION 13.3 PRECAUTIONS FOR TRANSPORTATION WARNING • Determine the route for transporting the machine by taking into account the width, height and weight of the machine. • Always check that the door on the cab is closed and locked before transporting the machine.
Page 131: Cold Weather Operation
14. COLD WEATHER OPERATION 14.1 PRECAUTIONS FOR LOW TEMPERATURE If the temperature becomes low, it becomes difficult to start the en- gine, and the coolant may freeze, so do as follows. 14.1.1 FUEL AND LUBRICANTS Change to fuel and oil with low viscosity for all components. For de- tails of the specified viscosity, see 20.
Page 132 14. COLD WEATHER OPERATION 14.1.3 BATTERY WARNING • To avoid gas explosions, do not bring fire or sparks near the battery. • Battery electrolyte is dangerous. If it gets in your eyes or on your skin, wash it off with large amounts of water, and consult a doctor.
Page 133: Precautions After Completion Of Work
14. COLD WEATHER OPERATION 14.2 PRECAUTIONS AFTER COMPLETION OF WORK To prevent mud, water, or the undercarriage from freezing and mak- ing it impossible for the machine to move on the following morning, al- ways observe the following precautions. • Mud and water on the machine body should be completely removed.
Page 134: Long-Term Storage
15. LONG-TERM STORAGE 15.1 BEFORE STORAGE NOTICE To protect the cylinder rod when the machine is not being used, set the work equipment in the posture shown in the diagram. (This prevents rusting of the cylinder rod) When putting the machine in storage for a long time, do as follows. •...
Page 135: During Storage
15.4 AFTER STORAGE NOTICE If the machine is stored without carrying out the monthly rust prevention operation, request your Komatsu distributor for service. Carry out the following procedure when taking the machine out of long-term storage. • Wipe off the grease from the hydraulic cylinder rods.
Page 136: Troubleshooting
16. TROUBLESHOOTING 16.1 PHENOMENA THAT ARE NOT FAILURES Note that the following phenomena are not failures: When the arm is pulled in, the speed of movement will drop momen- tarily when the arm is more or less vertical. The bucket speed will drop momentarily when the bucket teeth are more or less horizontal.
Page 137: Precautions On Particular Jobsites
16. TROUBLESHOOTING 16.4 PRECAUTIONS ON PARTICULAR JOBSITES When carrying out digging operations in water, if the work equipment mounting pin goes into the water, carry out greasing every time the operation is carried out. For heavy-duty operations and deep digging, carry out greasing of the work equipment mounting pins every time before operation.
Page 138 16. TROUBLESHOOTING 16.5.1 STARTING ENGINE WITH BOOSTER CABLE When starting the engine with a booster cable, do as follows: Precautions when connecting and disconnecting booster cable WARNING • When connecting the cables, never contact the positive + + + + + and negative - - - - - terminals.
Page 139 16. TROUBLESHOOTING Connecting the booster cables Keep the starting switch at the OFF position. Connect the booster cable as follows, in the order of the numbers marked in the diagram. Make sure that the starting switches of the normal machine and problem machine are both at the OFF position.
Page 140 16. TROUBLESHOOTING Disconnecting the booster cables After the engine has started, disconnect the booster cables in the reverse of the order in which they were connected. Remove one clip of booster cable from the engine block of the problem machine. from the negative - - - - - ter- Remove the other clip of booster cable minal of the normal machine.
Page 141: Other Trouble
OTHER TROUBLE 16.6.1 ELECTRICAL SYSTEM • ( ): Always contact your Komatsu distributor when dealing with these items. • In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs. Problem Main causes Remedy •...
Page 142 16. TROUBLESHOOTING 16.6.2 CHASSIS • ( ): Always contact your Komatsu distributor when dealing with these items. • In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs. Problem Main causes Remedy Speed of travel, swing, boom, arm, •...
Page 143 16. TROUBLESHOOTING 16.6.3 ENGINE • ( ): Always contact your Komatsu distributor when dealing with these items. • In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs. Problem Main causes Remedy •...
Page 144 16. TROUBLESHOOTING ENGINE (cont’d (16.6.3)) Problem Main causes Remedy • Too much oil in oil pan • Add oil to specified level Exhaust gas is white or blue “CHECK BEFORE STARTING” • Change to specified fuel • Improper fuel • Clogged air cleaner element •...
Page 145 If applying the swing brake, manu- ally operate the swing brake using the swing lock switch. In this case, immediately have the swing brake system inspected by your Komatsu distributor. (*) Governor system error Governor will not execute the control function.
Page 146 MEMO 2-102...
Page 147: Maintenance
MAINTENANCE...
Page 148: Guides To Maintenance
Komatsu genuine replacement parts: Use Komatsu genuine parts specified in the Parts Book as replacement parts. Komatsu genuine oils: Use Komatsu genuine oils and grease. Choose oils and grease with proper viscosity’s specified for ambient tem- perature. Always use clean washer fluid: Use automobile window washer fluid and be careful not to let any dirt get into it.
Page 149 17. GUIDES TO MAINTENANCE Warning tag: Attach the warning tag to the starting switch or other appropriate control lever to avoid someone who is not aware of the circumstances from starting the engine. Obey precautions: During the operation, always obey the precautions on the safety label attached to the machine. Welding instructions: •...
Page 150 17. GUIDES TO MAINTENANCE Pre-and post-work checks: Before starting work in mud, rain, snow or at seashore, check plugs and valves for tightness. Wash the machine immediately after the work to protect components from rusting. Lubricate components more frequently than usual. Be sure to lubricate work equipment pins daily if they are submerged in water.
Page 151: Outlines Of Service
When changing the oil, always replace the related filters at the same time. • We recommend you to have an analysis made of the oil periodically to check the condition of the machine. For those who wish to use this service, please contact your Komatsu distributor.
Page 152 When using anti-freeze, always observe the precautions given in the Operation and Maintenance Manual. • Komatsu machines are supplied with Komatsu original anti-freeze in the coolant when the machine is shipped. This anti-freeze is effective in preventing corrosion of the cooling system.
Page 153 • When replacing oil filters, check if any metal particles are stuck to the old filter. If any metal particles are found, please contact your Komatsu distributor. • Do not open packs of spare filters until just before they are to be used.
Page 154 KEY TO LUBRICATION POINTS Engine oil Check level refer to 24.3.2 Change oil refer to 24.6.3 Hydraulic oil Check level refer to 24.3.4 Change oil refer to 24.8.2 Swing machinery oil Check level refer to 24.4.2 Change oil refer to 24.7.1 Boom cylinder foot pin Grease refer to 24.4.1...
Page 155: Outline Of Electric System
• Since the controller for the control system may cause malfunction due to external wave interference, before installing a radio receiver and a walkie-talkie or citizen band, consult your Komatsu distributor. • When working on the seashore, carefully clean the electric system to prevent corrosion.
Page 156: Outline Of Hydraulic System
18. OUTLINES OF SERVICE 18.3 OUTLINE OF HYDRAULIC SYSTEM • During operation and immediately after operation is ended, the temperature of the hydraulic system still re- mains high. In addition, high hydraulic pressure is applied to the system. Take care when inspecting and maintaining the hydraulic system.
Page 157: Wear Parts List
Wear parts such as filter elements are to be replaced at the time of periodic maintenance. The wear parts should be changed correctly in order to use the machine economically. For part change, ,Komatsu genuine parts of excellent quality should be used. When ordering parts, please check the part number in the parts book.
Page 158: Use Of Fuel, Coolant And Lubricants According To Ambient Temperature
20. USE FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS KIND AMBIENT TEMPERATURE CAPACITY RESERVOIR -40 -22 104°F FLUID Specified Refill -40 -30 40°C SAE 30 26.3 l 23.6 l SAE 10W Engine oil pan 6.23 US gal 6.95 US gal 5.19 UK gal...
Page 159 20. USE FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE REMARK • We recommend Komatsu genuine lubricants (Spectrum XXX) oil which has been specifically formulated and approved for use in engine and hydraulic work equipment applications. (See reference table on page 3-14) •...
Page 160 [GL-4 or GL-5] [Lithium-Base] [Ethylene Glycol (The 15W40 oil SAE80, 90, 140 NLGI No. 2 Base] marked * is CE.) Permanent Type EO10-CD AF-ACL KOMATSU EO30-CD GO90 G2-LI AF-PTL E010-30CD GO140 G2-LI-S AF-PT (Winter, one E015-40CD season type) Diesel sigma S...
Page 161 20. USE FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE Engine Oil [CD, CE or CF-4] Anti-freeze SAE10 W, 30, 40 Gear Oil Grease Coolant Supplier 10W30, 15W40 [GL-4 or GL-5] [Lithium-Base] [Ethylene Glycol (The 15W40 oil SAE80, 90, 140 NLGI No.
Page 162 20. USE FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE SPECTRUM XXX KOMATSU GENUINE LUBRICANTS TYPE CLASS VISCOSITY REF.NO. Engine oil CF - 4 SAE15W - 40 EO - 1540 CF - 4 SAE10W - 30 EO - 1030 TRANSMISSION OIL...
Page 163: Precautions When Handling
PRECAUTIONS WHEN HANDLING Features of 2-Piece Boom & Arm This sketch shows format of two piece boom machine, including location of grease points (For 1st and 2nd booms only). • For starting procedure, refer to operation & maintenance manual for PC290LC/NLC-6K 3-17...
Page 164 PRECAUTIONS WHEN HANDLING OPERATION: explanation of Devices Dual Purpose Control Pedal. The additional pedal to the right of the travel levers controls two functions on a PC290LC/NLC-6K-Piece Boom machine: In normal operation the pedal controls the operation of the second boom adjust cylinder. Pressing down on the front of the pedal pushes the second boom away from the cab, pressing down on the rear of the pedal pulls the second boom towards the cab.
Page 165: Testing And Adjusting
Furrows in base metal (checks before starting). • Note If any abnormality is found during inspection, please contact your Komatsu distributor. For details of inspection and maintenance items for the chassis other than those listed above, see the Operation and Maintenance Manual for the PC290LC/NLC-6K...
Page 166: Periodic Maintenance
PERIODIC MAINTENANCE • Changing the hydraulic oil When changing the hydraulic oil, set the work equipment in the posture shown below. • Hydraulic oil capacity for the 2-piece boom machine is 187 litres. • Periodic maintenance required is the same as mono-boom machine. Therefore refer to the operation and maintenance manual for PC290LC/NLC-6K.
Page 167: Standard Tightening Torques For Bolts And Nuts
09019-08035 Grease Pump 07950-10450 For greasing work Nozzle 07951-11400 Grease cartridge 07950-90403 (Lithium base grease, 400 g) Hammer 09039-00150 Pinch bar 09055-00520 Gauge 09054-0009 If any of the above tools are broken, please order them from your Komatsu distributor. 3-21...
Page 168: Torque List
The tightening torque is determined by the width across the flats <b> of the nut and bolt. If it is necessary to replace any nut or bolt, always use a Komatsu genuine part of the same size as the part that was replaced.
Page 169: Periodic Replacement Of Safety Critical Parts
If the hose clamps show any deterioration, such as deformation or cracking, replace the clamps at the same as the hoses. When replacing the hoses, always replace the O-rings, gaskets, and other such parts at the same time. Ask your Komatsu distributor to replace the safety critical parts. 3-23...
Page 170 22. PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS SAFETY CRITICAL PARTS Safety critical parts for periodic replacement Q’ty Replacement interval Fuel hose (fuel tank - sedimenter) Fuel hose (sedimenter - lift pump) Spill hose (engine - tank) Every 2 years or 4000 hours, which Pump outlet hose (Pump to control valve) ever comes sooner...
Page 171 22. PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS 3-25...
Page 172: Maintenance Schedule Chart
23. MAINTENANCE SCHEDULE CHART 23.1 MAINTENANCE SCHEDULE CHART SERVICE ITEM PAGE INITIAL 250 HOURS SERVICE (only after the first 250 hours) Replace fuel filter cartridge 3-29 WHEN REQUIRED Check, clean and replace air cleaner element 3-30 Clean inside of cooling system 3-32 Check and tighten track shoe bolts 3-36...
Page 173 23. MAINTENANCE SCHEDULE CHART SERVICE ITEM PAGE Lubricating • Boom foot pin (2 points) 3-51 • Boom cylinder rod end (2 points) 3-51 • Arm cylinder foot pin (1 point) 3-51 • Boom-arm coupling pin (1 point) 3-52 • Arm cylinder rod end (1 point) 3-52 •...
Page 174: Maintenance Interval When Using Hydraulic Breaker
23. MAINTENANCE SCHEDULE CHART SERVICE ITEM PAGE EVERY 1000 HOURS SERVICE Change oil in swing machinery case 3-65 Check oil level in damper case, add oil 3-66 Check all tightening parts of turbocharger 3-66 Check play of turbocharger rotor 3-66 Check and adjust valve clearance (1 1000 hour only) 3-66...
Page 175: Service Procedure
24. SERVICE PROCEDURE 24.1 INITIAL 250 HOURS SERVICE Carry out the following maintenance only after the first 250 hours. • REPLACE FUEL FILTER CARTRIDGE For details of the method of replacing or maintaining, see the section on EVERY 500 HOURS SERVICE. 3-29...
Page 176: When Required
24. SERVICE PROCEDURE 24.2 WHEN REQUIRED 24.2.1 CHECK, CLEAN AND REPLACE THE AIR CLEANER ELEMENT WARNING • Never clean or replace the air cleaner element with the engine running. • When using pressured air to clean the element, wear safety glasses or goggles to protect the eyes. Checking If air cleaner clogging monitor flashes, clean the air cleaner element.
Page 177 24. SERVICE PROCEDURE If small holes or thinner parts are found on the element when it is checked with an electric bulb after cleaning, replace the element NOTICE Do not use an element whose folds or gasket or seal are damaged.
Page 178 24. SERVICE PROCEDURE 24.2.2 CLEAN INSIDE OF COOLING SYSTEM WARNING • Soon after the engine has been stopped, the coolant is hot and can cause personal injury. Allow the engine to cool before draining water. • Since cleaning is performed while the engine is running, it is very dangerous to enter the rear side of the machine as the machine may suddenly start moving.
Page 179 Antifreeze is flammable, so keep it away from any flame. • Use city water for the cooling water. If river water, well water or other such water supply must be used, contact your Komatsu distributor. • We recommend use of an antifreeze density gauge to control the mixing proportions.
Page 180 After draining the water, clean with a flushing agent. We recommend BP000400 use of a Komatsu genuine cleaning agent. For details of the cleaning method, see the instructions given with the cleaning agent. After cleaning, open drain valve...
Page 181 24. SERVICE PROCEDURE 10. When the water is completely clean, stop the engine, close drain valve , wrap the drain plug with seal tape, then close drain plug 11. Install the undercover. 12. Add cooling water until it overflows from the water filler. 13.
Page 182 24. SERVICE PROCEDURE 24.2.3 CHECK AND TIGHTEN TRACK SHOE BOLTS If the machine is used with track shoe bolts loose, they will break, so tighten any loose bolts immediately. Method for tightening Tighten first to a tightening torque of 390 ± 40 Nm (40 ± 4 kgm, 290 ±...
Page 183 24. SERVICE PROCEDURE 24.2.4 CHECK AND ADJUST TRACK TENSION WARNING Carry out this operation with two workers. The operator must move the machine in accordance with the signals from the other worker. The track tension is checked with the chassis raised, so it extremely dangerous if the machine is lowered by mistake dur- ing the inspection.
Page 184 Check the track tension again, and if the tension is not correct, adjust it again. Continue to pump in grease until S becomes 0 mm. If the tension is still loose, the pin and bushing are excessively worn. so they must be either turned or replaced. Please contact your Komatsu distributor 3-38...
Page 185 Check the track tension again., and if the tension is not correct, ad- just it again. 24.2.5 CHECK ELECTRICAL INTAKE AIR HEATER Before the start of the cold season (once a year), contact your Komatsu distributor to have the electrical intake air heater repaired or checked for dirt or disconnections. 3-39...
Page 186 24. SERVICE PROCEDURE 24.2.6 REPLACE BUCKET SIDE CUTTERS WARNING It is dangerous if the work equipment moves by mistake when the teeth are being replaced. Set the work equipment in a stable con- dition, then stop the engine and apply the locks securely to the levers.
Page 187 24. SERVICE PROCEDURE 24.2.7 REPLACE BUCKET TEETH Replace the point before the adapter starts to wear. WARNING It is dangerous if the work equipment moves by mistake when the teeth are being replaced. Set the work equipment in a stable condition, then stop the engine and apply the locks securely to the levers.
Page 188 24. SERVICE PROCEDURE If the rear face of the hole for the pin op point is protruding to the front from the rear face of the pin hole for adapter , do not try to knock the pin in. There is something preventing point from entering adapter fully, so remove the obstruction.
Page 189 24. SERVICE PROCEDURE 24.2.8 ADJUST BUCKET CLEARANCE WARNING It is dangerous if the work equipment moves by mistake when the clearance is being adjusted. Set the work equipment in a stable condition, then stop the engine and lock the lever securely. WARNING •...
Page 190 24. SERVICE PROCEDURE 24.2.9 CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID If air is ejected with the window washer fluid, check the fluid level in window washer tank . If showing under the level, fill with automobile window washer fluid. When adding fluid, be careful not to let dirt or dust get in.
Page 191 24. SERVICE PROCEDURE 24.2.10 CHECK AND ADJUST AIR CONDITIONER CHECK LEVEL OF REFRIGERANT (GAS) WARNING If the liquid get into your eyes or on your hands, it may cause loss of sight or frostbite, so never loosen any part of the refrigerant circuit.
Page 192: Check Before Staring
24. SERVICE PROCEDURE 24.3 CHECK BEFORE STARTING 24.3.1 CHECK COOLANT LEVEL, ADD WATER WARNING Do not open the radiator cap unless necessary. When check- ing the coolant, always check the radiator reserve tank when the engine is cold. Open the rear door on the left side of the machine and check that the cooling water level is between the FULL and LOW marks on radiator reserve tank (shown in the diagram on the right).
Page 193 24. SERVICE PROCEDURE If the oil is above the H mark, drain the excess engine oil using drain plug in the bottom of oil pan, and check the oil level again. If the oil level is correct, tighten the oil filler cap securely and close the engine hood.
Page 194 24. SERVICE PROCEDURE 24.3.4 CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL WARNING • When removing the oil filler cap, oil may spurt out, so turn the cap slowly to release the internal pressure before removing the cap. • If oil has been added to above the H mark, stop the engine and wait for the hydraulic oil to cool down, then drain the excess oil from drain plug If the work equipment is not in the condition shown in the diagram on...
Page 195 Check also for loose terminals and tighten any loose parts. Check the following points carefully. • Battery • Starting motor • Alternator Please contact your Komatsu distributor for investigation and correction of the cause. 3-49...
Page 196 24. SERVICE PROCEDURE 24.3.7 CHECK FOR WATER AND SEDIMENT IN SEDIMENTOR. DRAIN WATER AND SEDIMENT A fuel sedimentor is mounting in the pump compartment and is accessed by the door on the right hand side of the machine. Entrapped sediment and water can be seen through the the glass bowl. Loosen drain plug and drain water and sediement until none is visible in bowl.
Page 197: Every 100 Hours Service
24. SERVICE PROCEDURE 24.4 EVERY 100 HOURS SERVICE 24.4.1 LUBRICATING The minimum greasing interval is 100 hours. However, more frequent greasing will be required depending on con- ditions/environment. Set the work equipment in the greasing posture below, then lower the work equipment to the ground and stop the engine.
Page 198: Boom-Arm Coupling Pin (1 Point)
24. SERVICE PROCEDURE Boom-Arm coupling pin (1 point) Arm cylinder rod end (1 point) Bucket cylinder foot pin (1 point) Arm-Link coupling pin (1 point) Arm-Bucket coupling pin (1 point) 10. Link coupling pin (2 points) 11. Bucket cylinder rod end (1 point) 12.
Page 199: Drain Water And Sediment From Fuel Tank
24. SERVICE PROCEDURE If the oil does not reach the L mark on dipstick , add engine oil through dipstick insertion hole When refilling, remove bleeding plug For details of the oil to use, see 20. “USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE”.
Page 200 24. SERVICE PROCEDURE Rinse filter with clean water from the fine filter side. Dry filter, compressed air may be used, but apply air from fine filter side. Refit filter element ensuring coarse filter side is facing outwards. Notice. The normal cleaning interval is 100 hours, however if the ma- chine is used at a dusty side, shorten this interval.
Page 201: Every 250 Hours Service
24. SERVICE PROCEDURE 24.5 EVERY 250 HOURS SERVICE 24.5.1 CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD WARNING • The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool down before start- ing the operation.
Page 202: Check Level Of Battery Electrolyte
24. SERVICE PROCEDURE 24.5.2 CHECK LEVEL OF BATTERY ELECTROLYTE WARNING • To avoid gas explosions, do not bring fire or sparks near the battery. • Battery electrolyte is dangerous. If it gets in your eyes or on your skin, wash it off with large amounts of water, and consult a doctor.
Page 203: Lubricate Swing Circle (3 Points)
24. SERVICE PROCEDURE 24.5.3 LUBRICATE SWING CIRCLE (3 points) Lower the work equipment to the ground. Using a grease pump, pump in grease through the grease fittings shown by arrows. After greasing, wipe off all the old grease that was pushed out. 3-57...
Page 204: Check Air Conditioner Compressor Belt Tension Adjust
24. SERVICE PROCEDURE 24.5.4 CHECK AIR CONDITIONER COMPRESSOR BELT TENSION ADJUST. CHECKING Remove belt guard Press compressor drive belt midway between fan pulley and com- pressor pulley. The belt should normally deflect by about 15 - 18 mm (0.60 - 0.70 inch) when pressed with the finger (with a force of approx.
Page 205: Every 500 Hours Service
24. SERVICE PROCEDURE 24.6 EVERY 500 HOURS SERVICE Maintenance for every 100 and 250 hours should be carried out at the same time. 24.6.1 REPLACE FUEL FILTER CARTRIDGES WARNING • Engine is at high temperature immediately after the machine has been operated. Wait for engine to cool down before re- placing the filter.
Page 206 24. SERVICE PROCEDURE BLEEDING THE FUEL SYSTEM Controlled venting is provided at the injection pump through the fuel drain manifold. Small amounts of air introduced by changing the filters or injec- tion pump supply line will be vented automatically, if the fuel filter is changed in accordance with the instructions.
Page 207: Check Swing Pinion Grease Level, Add Grease
Check if the grease is milky white. If it is milky white, it is necessary to change the grease. Please contact your Komatsu distributor. The total amount of grease is 33 l (29.7 kg) (8.7 US gal, 7.3 UK gal [65.5 lb]).
Page 208: Change Oil In Engine Oil Pan, Replace Engine Oil Filter Cartridge
Check the drained oil, and if there are excessive metal particles or foreign material, please contact your Komatsu distributor. Install drain tap Open the engine hood. Using the filter wrench from the upper side of the engine, turn filter cartridge counterclockwise to remove it.
Page 209: Clean And Inspect Radiator Fins, Oil Cooler Fins And Condensor Fins
24. SERVICE PROCEDURE 24.6.4 CLEAN AND INSPECT RADIATOR FINS, OIL COOLER FINS AND CONDENSER FINS (ONLY FOR MACHINES EQUIPPED WITH AIR CONDI- TIONER) WARNING If compressed air, steam, or water hit your body directly, there is danger of injury. Always wear protective glasses. mask, and safety shoes.
Page 210: Replace Hydraulic Tank Breather Element
24. SERVICE PROCEDURE 24.6.5 REPLACE HYDRAULIC TANK BREATHER ELEMENT WARNING Wait for the oil to cool down before replacing the breather ele- ment. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it carefully. Remove the cover over the hydraulic tank and remove the cap of oil filter Replace element...
Page 211: Every 1000 Hours Service
24. SERVICE PROCEDURE 24.7 EVERY 1000 HOURS SERVICE Maintenance for every 100, 250 and 500 hours should be carried out at the same time. 24.7.1 CHANGE OIL IN SWING MACHINERY CASE WARNING The oil is at high temperature immediately after the machine has been operated.
Page 212 TURBOCHARGER Contact your Komatsu distributor to have the tightening portions checked. 24.7.4 CHECK PLAY OF TURBOCHARGER ROTOR. Ask Komatsu distributor to check the play of the turbocharger rotor. 24.7.5 CHECK & ADJUST VALVE CLEARANCE Adjusting the valves As a special tool is required for removing and adjusting the parts request Komatsu for service.
Page 213 24. SERVICE PROCEDURE 24.7.6 CHECK FAN BELT TENSIONER BEARING BELT AND FAN HUB. • Check fan belt Remove the drive belt by lifting tensioner using a 3/8 inch square drive wrench to release the tension. Inspect the belt for damage. Replace belt if any damage is found.
Page 214: Every 2000 Hours Service
24. SERVICE PROCEDURE 24.8 EVERY 2000 HOURS SERVICE Maintenance for every 100, 250, 500 and 1000 hours should be carried out at the same time. 24.8.1 CHANGE OIL IN FINAL DRIVE CASE WARNING • The oil is at high temperature immediately after the machine has been operated.
Page 215 24. SERVICE PROCEDURE 24.8.2 CLEAN HYDRAULIC TANK STRAINER WARNING The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool down before clean- ing the strainer. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it carefully.
Page 216 24.8.4 CHECK ALTERNATOR, STARTING MOTOR The brush may be worn, or the bearing may have run out of grease, so contact your Komatsu distributor for inspection or repair. If the engine is started frequently, carry out inspection every 1000 hours.
Page 217: Every 4000 Hours Service
24.9.1 CHECK WATER PUMP Check that there is oil leakage, or clogging of the drain hole. If any abnormality is found, contact your Komatsu distributor for disaaaembly and repair or replacement. 3-71...
Page 218: Every 5000 Hours Service
24. SERVICE PROCEDURE 24.10 EVERY 5000 HOURS SERVICE Maintenance for every 100, 250, 500 and 1000 hours should be carried out at the same time. 24.10.1 CHANGE OIL IN HYDRAULIC TANK WARNING The oil is at high temperature immediately after the machine has been operated.
Page 219 24. SERVICE PROCEDURE Add the specified amount of engine oil through oil filler port Check that the oil level is between H and L on the sight gauge. NOTICE For details of the oil to use, see “20. USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE”.
Page 220 24. SERVICE PROCEDURE Air bleeding procedure Follow Steps 1 to 7 to bleed the air. Bleeding air from pump 1. Loosen air bleeding plug , and check that oil oozes out from the air bleed plug. 2. If oil does not ooze out from the plug, remove the drain hose from the pump case, and add oil through drain port to fill the pump case with hydraulic tank.
Page 221 24. SERVICE PROCEDURE Bleeding air from swing motor 1. Run the engine idle at a low speed for about five minutes, then loosen drain port plug and confirm that oil flows out. NOTICE When doing this, do not operate the swing. 2.
Page 222 24. SERVICE PROCEDURE Bleeding air from attachment (if installed) For machines equipped with attachments such as the breaker, actu- ate the attachment pedal about 10 times to bleed the air completely from the attachment circuit while running the engine at low idling. NOTICE If the attachment bleeding procedure is specified by the manu- facturer, bleed the attachment according to such procedure.
Page 223: Specifications
SPECIFICATIONS...
Page 224: Machine Specifications
600mm 600mm (24 in) width ( 24 in) width ENGINE • Model Komatsu SA6D102EA-1 diesel engine • Flywheel horsepower (SAEJ1349) Net 130 kW (174 HP) 2200 rpm Gross 138 kW (185 HP) 2200 rpm • Starting motor 24 V 5.5 kW •...
Page 225 25. SPECIFICATIONS PC290LC-6K...
Page 226 25. SPECIFICATIONS PC290NLC-6K...
Page 227 25. SPECIFICATIONS PC290LC-6K, PC290NLC-6K Never allow another person than the operator to enter the swing range (Max. swing range, Max. digging radius). Arm length 2000mm 2500mm 3050mm 3500mm (6’-7”) (8’-2”) (10’-0”) (11’-6”) Max. digging height 9322 9389 9735 9867 (30’-7”) (30’-9”)
Page 228: Explanation Of Lifting Capacity Chart
25. SPECIFICATIONS 25.2 EXPLANATION OF LIFTING CAPACITY CHART PC290LC/NLC-6K PC290LC-6K LEGEND : Reach from swing centre : Bucket hook height Lifting capacity (rating overfront) Lifting capacity (rating overside) LEGEND Position of lifting point Arm length: Boom length Hydraulic pressure: Nom 36.2 MPa WORKING Max.
Page 229 25. SPECIFICATIONS LIFTING CAPACITY CHART PC290NLC-6K LEGEND : Reach from swing centre : Bucket hook height Lifting capacity (rating overfront) Lifting capacity (rating overside) LEGEND Position of lifting point Arm length: Boom length Hydraulic pressure: Nom 36.2 MPa WORKING Max. 37.2 MPa HOLDING CIRCUIT WORKING CONDITIONS: WITH BUCKET (800kg 1.1m CECE).
Page 230 25. SPECIFICATIONS (Mono Boom)
Page 231: Transportation
TRANSPORTATION PROCEDURE FOR LOADING ON TO TRAILER • Loading and unloading procedure. Refer to the operation and maintenance manual for PC290LC/NLC-6K for correct procedure for loading and unloading of machine. (2-piece boom machine is same as mono-boom machine) For information on loading and unloading machine for transportation refer to the operation & maintenance manual for PC290LC/NLC-6K.
Page 232 COMPONENTS DIMENSIONS AND WEIGHTS (Approximate weights) • (Two piece Boom) Shoes width Shoes width PC290LC-6 PC290NLC-6 600 mm 23550 kg 23435 kg 700 mm 23900 kg 23785 kg 800 mm 24250 kg 24135 kg 900 mm 24600 kg 24485 kg Weight 2800 1312 kg...
Page 233: Options And Attachments
OPTIONS, ATTACHMENTS...
Page 234: General Precautions
26. GENERAL PRECAUTIONS 26.1 PRECAUTIONS RELATED TO SAFETY If attachments or options other than those authorised by Komatsu are installed, this will not only affect the life of the machine, but will also cause problems with safety. When installing attachments not listed in this Operation and Maintenance Manual, please contact your Komatsu distributor first.
Page 235: Precautions When Installing Attachments
• Always follow the correct procedure when installing the boom and arm. If the correct procedure is not followed, this may lead to serious damage or injury, so please consult your Komatsu distributor before carrying out installation.
Page 236: Handling Bucket With Hook
WITH HOOK Check that there is no damage to the hook, stopper, or hook mount. If any abnormality is found, please contact your Komatsu distributor. 27.2 PROHIBITED OPERATIONS The standard work equipment must not be used for lifting loads. If this machine is to be used for lifting loads, it is necessary to install the special bucket with hook.
Page 237: Machine Ready For Attachments
28. MACHINES READY FOR ATTACHMENTS 28.1 EXPLANATION OF COMPONENTS STOP VALVE This valve stops the flow of the hydraulic oil. FLOW : Hydraulic oil flows. STOP : Hydraulic oil stops. Set this valve to the STOP position when remov- ing or installing attachments. SELECTOR VALVE This switches the flow of the hydraulic oil.
Page 238 28. MACHINES READY FOR ATTACHMENTS ATTACHMENT CONTROL PEDAL This is used to operate the attachment. When the operator depresses the pedal at the front, neutral or rear portions, the attachment moves as follows. Hydraulic breaker Pedal front : actuated Pedal neutral : stopped Pedal rear : stopped...
Page 239: Hydraulic Circuit
28. MACHINES READY FOR ATTACHMENTS 28.2 HYDRAULIC CIRCUIT Change-over hydraulic circuit Contact dealer to set left hand boom piping relief pressure. When using the breaker and the general attachment (Crusher etc.), turn the rotor of the 3 way valve to change over according to the follow- ing illustration.
Page 240 28. MACHINES READY FOR ATTACHMENTS 28.2.1 CONNECTING HYDRAULIC CIRCUIT When connecting the attachment, connect the circuit as follows. Remove blind plugs located on the end of the stop valve piping (2 places, left and right). Take care not to lose or damage the removed parts. Connect attachment tubes supplied by the attachment manufac- turer to the end from which the plug was removed in step 1.
Page 241: Attachment Mounting / Dismounting Procedure
28. MACHINES READY FOR ATTACHMENTS 28.3. ATTACHMENT MOUNTING / DISMOUNTING PROCEDURE DISMOUNTING PROCEDURE Curl the arm in then lower the boom to the ground. Set the attachment valves on the arm to the stop position as shown. Place the attachment on the ground and stop the engine.
Page 242 28. MACHINES READY FOR ATTACHMENTS MOUNTING PROCEDURE Remove the bucket. For bucket dismounting procedure, see 12.16 “REPLACEMENT AND INVERSION OF BUCKET’’. Place the attachment on a flat place, install pins to the arm in that order. After mounting the attachment, stop the engine. Operate each work equipment control lever and the attachment control pedal to full pin a stroke back and forth, right and left to eliminate the internal pressure...
Page 243: Operation
28. MACHINES READY FOR ATTACHMENTS 28.4 OPERATION WARNING • If the pedal is operated inside the deceleration range, the en- gine speed will rise suddenly. Be careful. • If the operator rests his foot on the attachment pedal while operating the machine, if he carelessly depresses the pedal, the attachment may move suddenly and result in serious trou- ble.
Page 244: Long-Term Storage
28. MACHINES READY FOR ATTACHMENTS WHEN USING GENERAL ATTACHMENT SUCH AS CRUSHER When the pedal is depressed at the front or rear portions, the attach- ment is actuated. Precautions when using • Check that the stop valve is at the FLOW position. •...
Page 245: First Attachment With Clam-Shell Option
28.7 FIRST ATTACHMENT WITH CLAM-SHELL OPTION • Machines fitted with a single attachment circuit can also be supplied with clam-shell grab piping or can have such piping fitted at a later time. • The clam-shell open/close function uses the bucket cylinder circuit with the bucket cylinder disable by the two arm mounted stop valves (Left hand side exemple shown below).
Page 246: First And Second Attachment
28.8 FIRST AND SECOND ATTACHMENT • This option can only be fitted to machines that have the main valve converted to or supplied with 2 attachment spool additions (8 spools in total) • The arm end valves are set to the flow or stop position as shown in the figure below. •...
Page 247: Introduction Of Attachments
29. INTRODUCTION OF ATTACHMENTS 29.1 SPECIFICATION, USE Name Specifications, use Track shoes Triple grouser shoe width 700 mm (28”) Triple grouser shoe width 600 mm (24”) Triple grouser shoe width 800 mm (31.4”) Triple grouser shoe width 900 mm (35.4”) Short arm Arm length 2000 mm (6’7”)
Page 248 29. INTRODUCTIONS OF ATTACHMENTS 29.2 ATTACHMENT INSTALLATION COMBINATION TABLE PC290LC-6K, PC290NLC-6K This table lists the combination of attachments which can be installed to the standard short arms. Can be used for general digging. Can be used only for light-duty digging and loading work.
Page 249: Selection Of Track Shoes
(swampy ground) • Travel at Hi speed only on flat ground, and if it is impossible to avoid going over obstacles, shift down and travel at half speed in Lo. Table 2 PC290LC-6K PC290NLC-6K Specifications Category Specifications Category...
Page 250: Selection Of Bucket Teeth
29. INTRODUCTIONS OF ATTACHMENTS 29.4 SELECTION OF BUCKET TEETH Select suitable bucket teeth to match the operating conditions. METHOD OF SELECTING TEETH The standard teeth can be used over a wide range, but according to the operating conditions, we recommend the following teeth.
Page 251: Handling Trapezoidal Bucket
29. INTRODUCTIONS OF ATTACHMENTS 29.5 HANDLING TRAPEZOIDAL BUCKET This bucket is used to dig trapezoidal ditches on paddy fields, farm- land ect. and can dig 3 types of ditch gradients ( 45 , 40 and 38 ) when a movable plate is attached. •...
Page 252: Using The Extension Arm
29. INTRODUCTIONS OF ATTACHMENTS 29.6 USING THE EXTENSION ARM When the extension arm is installed, be careful when retracting the arm because the bucket hits the foot of the boom cylinder or the lower frame of the swing circle. be careful at operation and transportation. (a): Prohibited zone to be operated •...
Page 253: Handling The Clamshell Bucket
29. INTRODUCTIONS OF ATTACHMENTS 29.7 HANDLING THE CLAMSHELL BUCKET This bucket is used for digging and loading in side-ditches or the confined spaces. How to perform excavation This clamshell digs by pushing the boom against the ground. However, when perform bucket operation, perform digging while gradually raising the boom.
Page 254: Extending Machine Service Lift
NOTICE Select the attachment most suited to the machine body. • The machine models to which attachments can be mounted vary. For selection of attachment and machine model, consult your Komatsu distributor. 30.1 HYDRAULIC BREAKER MAIN FIELDS OF APPLICATION °...
Page 255 30. EXTENDING MACHINE SERVICE LIFE When applying continuous impact to the same impact surface, if the chisel does not penetrate or break the surface within 1 minute, change the point of impact and carry out breaking operations closer to the edge. The direction of penetration of the chisel and the direction of the breaker body will gradually move out of line with each other, so always adjust the bucket cylinder to keep them aligned.
Page 256 30. EXTENDING MACHINE SERVICE LIFE Moving the chisel while carrying out impacting operations Holding the chisel horizontal or pointed up when carrying out impacting operations Twisting the chisel when it has penetrated the rock Pecking operations Extending the bucket cylinder fully and thrusting to raise the machine off the ground 5-22...
Page 257: Power Ripper
30. EXTENDING MACHINE SERVICE LIFE 30.2 POWER RIPPER MAIN FIELDS OF APPLICATIONS • Road repair work • Demolition work This attachment can be used for a wide range of work including peel- ing off and crushing pavement roads, demolishing wooden houses and buildings, and crushing foundation and roadbeds.
Page 258: Fork Grab
30. EXTENDING MACHINE SERVICE LIFE 30.3 FORK GRAB MAIN FIELDS OF APPLICATION ° Disposing of industrial waste ° Disposing of demolition waste This can be used for a wide range of work including collecting or loading demolition waste materials and debris, timber, grass. MISTAKEN METHODS OF USE To ensure that the machine has a long life, and to ensure that opera- tions are carried out in safety, do not operate the machine in ‘...
Page 259: Grapple Bucket
30. EXTENDING MACHINE SERVICE LIFE 30.4 GRAPPLE BUCKET MAIN FIELDS OF APPLICATION ° Demolition ° Disposing of industrial waste ° Forestry This bucket is widely used for demolition including breaking-up work, grading and digging, clean-up work after natural disasters, dumping in- dustrial waste, and forestry work, etc.
Page 260: Scrap Grapple
30. EXTENDING MACHINE SERVICE LIFE 30.5 SCRAP GRAPPLE MAIN FIELDS OF APPLICATION ° Disposal of rock or debris This attachment is mounted to the arm end and used to grasp rock, debris etc. by opening and closing the claws (3 to 5) corresponding to the extension and retraction of the hydraulic cylinder.
Page 261: Crusher & Cutter
30. EXTENDING MACHINE SERVICE LIFE 30.6 CRUSHER & CUTTER MAIN FIELDS OF APPLICATION ° Demolition ° Road repair work This is the optimum attachment for demolition of steel frame rein- forced structures, and for crushing of concrete blocks and rock, etc. The unique blade shape provides heavy crushing power.
Page 262: Hydraulic Pile Driver
30. EXTENDING MACHINE SERVICE LIFE 30.7 HYDRAULIC PILE DRIVER MAIN FIELDS OF APPLICATION ° Foundation work ° River work ° Water supply and sewerage This is a piling machine employing the hydraulic power source of the excavator. The machine features a long arm and a chuck unit. This facili- tates operations such as driving and removing long piles, driving in piles at corners, etc.
Page 263: Hydraulic Excavator With Multipurpose Crane
30. EXTENDING MACHINE SERVICE LIFE 30.8 HYDRAULIC EXCAVATOR WITH MULTIPURPOSE CRANE MAIN FIELDS OF APPLICATION ° Site preparation ° Water supply and sewerage ° River work ° Agricultural, civil engineering work Crane operation can be carried out without removing the bucket. This machine is used for laying U section gutters and pipes for water sup- ply and sewerage as well as river and canal work, agricultural, civil engi- neering work and site preparation.
Page 264 MEMO 5-30...

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